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                [Cerc2015]Ice Igloos                </h1>
                <p>时间限制：30s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  空间限制：512MB</p>			</div>
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                                <h3>题目描述</h3><p><p>一个坐落在北极冰冻湖面上的渔村因全球变暖而面临危险&mdash;&mdash;湖面开始破碎。村庄内有n座球形冰屋，每座冰屋在湖面上占据了一块圆形区域。<br />
一座冰屋可以视为平面座标系中的一个圆：其圆心座标为整数，其半径为小于1的一位浮点数。给出冰面断裂的座标，这些村民希望知道每次断裂会有多少个冰屋受到影响。<br />
形式上，给出q个询问，每个询问包括一条由两个端点确定的线段，查询每条线段贯穿的冰屋数。如果线段与圆的内部有至少一个交点，则线段贯穿了这座冰屋。</p></p><hr/><h3>输入格式</h3><p><p>第一行包括一个整数n(1&lt;=n&lt;=100 000)&mdash;&mdash;冰屋数。<br />
接下来的n行每行包括三个数x，y和r&mdash;&mdash;冰屋的座标和半径。x和y为整数且1&lt;=x,y&lt;=500。r是一位浮点数且0&lt;r&lt;1。冰屋之间不存在重叠或接触。<br />
你可以认为，对于任一冰屋i和线段s 的距离的平方小于r2-10-5或大于r2+10-5。</p></p><hr/><h3>输出格式</h3><p><p>输出包括q行。第k行包括一个整数&mdash;&mdash;被第k条线段穿过的冰屋数</p></p><hr/><h3>样例输入</h3><pre>5
4 2 0.6
7 3 0.7
8 5 0.8
1 3 0.7
3 4 0.4
2
3 1 9 6
3 4 7 2</pre><hr/><h3>样例输出</h3><pre>2
1</pre><hr/><h3>提示</h3><p>没有写明提示</p><hr/><h3>题目来源</h3><p>没有写明来源</p>
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